checkpanels.java

java程序设计 清华出版社 孙燮华老师编写的程序源代码

import java.awt.*;

public class checkpanels extends Frame{
  checkboxpanel panel1,panel2,panel3;

  public checkpanels(){
    //setLayout(new GridLayout(1,3));//设置三块面板以一行三列布局
    setLayout(new FlowLayout());
    panel1=new checkboxpanel();
    panel2=new checkboxpanel();
    panel3=new checkboxpanel();
    add(panel1);
    add(panel2);
    add(panel3);
    setSize(200,120);
    setVisible(true);
  }
  public static void main(String args[]){
    checkpanels myPanel=new checkpanels();
  }
}

class checkboxpanel extends Panel{
  Checkbox check1,check2,check3,check4;
  checkboxpanel(){
    setLayout(new GridLayout(2,2));//在面板上设置四个复选框，以二行二列布局
    check1=new Checkbox("1");
    add(check1);
    check2=new Checkbox("2");
    add(check2);
    check3=new Checkbox("3");
    add(check3);
    check4=new Checkbox("4");
    add(check4);
  }
}